<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" />
      </div>
      <!-- 表单 -->
      <el-form
        :model="loginForm"
        :rules="loginRule"
        label-width="0px"
        class="login_form"
        ref="loginFormRef"
      >
        <el-form-item label="" prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="el-icon-user"
          ></el-input>
        </el-form-item>
        <el-form-item label="" prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="el-icon-lock"
            type="password"
          ></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      loginForm: {
        username: 'admin',
        password: '123456',
      },
      loginRule: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur',
          },
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          {
            min: 6,
            max: 15,
            message: '长度在 6 到 15 个字符',
            trigger: 'blur',
          },
        ],
      },
    }
  },
  methods: {
    resetLoginForm() {
      this.$refs.loginFormRef.resetFields()
    },
    login() {
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$axios.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登陆失败！')
        this.$message.success('登录成功！')
        //登录成功后使用token保存到sessionStorage
        window.sessionStorage.setItem('token', res.data.token)
        //history栈中添加，后退回到上一个界面
        this.$router.push('/home')
      })
    },
  },
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background-color: #fff;
  border-radius: 10px;

  .avatar_box {
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #eee;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    img {
      background-color: #eee;
      width: 100%;
      height: 100%;
      border-radius: 50%;
    }
  }
}
.login_form {
  position: absolute;
  padding-left: 20px;
  padding-right: 20px;
  width: 100%;
  bottom: 0;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>